JP3283226B2 - How to make a holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention holds a small microphone such as a portable telephone, a personal handy horn system (PHS), a personal digital assistant (PDA), a speaker, and the like (attachment electronic parts) on a substrate, The present invention also relates to a method of manufacturing a holder for making an electrical connection.

[0002]

2. Description of the Related Art In general, electrodes of electronic components such as microphones and speakers used in conventional cellular phones and portable communication devices are connected to substrate electrodes by soldering using lead wires. In this connection, thin lead wires must be manually soldered, which results in poor productivity and high cost. In addition, since there is a lead wire, a large mounting space is required, and it is not possible to cope with recent needs for miniaturization.

[0003] On the other hand, a method of making electrical connection between electrodes using a conductive elastic connector has been developed.

[0004]

However, the conductive elastic connector has a structure in which an insulating elastic part and a conductive elastic part are laminated, and a special manufacturing method is employed, so that a conventional holding part for mounting the mounting electronic parts is used. The part must take a separate manufacturing process, and therefore is manufactured as a separate part, so when mounting it requires detailed work to align the electrodes of the mounted electronic components and the electrodes of the elastic connector, Alternatively, it is necessary to bond the holding portion and the elastic connector portion, and the productivity is still low and the cost is high.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to simplify the mounting process, reduce the production cost, and reduce the space for the mounting portion.
It is intended to provide a method for manufacturing a holder .

Accordingly, the present invention provides a connection between an electrode of a mounting electronic component such as a small microphone or a speaker and an electrode of a substrate using a conductive elastic connector, and a holding portion for holding the mounting electronic component and an elastic connector. This is a method for manufacturing a holder in which a part is integrally formed so that mounting electronic parts can be easily mounted.

[0007]

FIG. 1 is an exploded view of a holder according to the present invention.

[0008] Electrical connection between the electrode 31 of the electrode 11 and the substrate 3 mounting electronic component 1 such as a small microphone or speaker, an elastic connector portion 2 ₁ of the conductive which is an elastic member, and the mounting of the electronic component 1 the holder 2 ₂ of the holder capable of being performed easily mounting are integrated with the elastic connector part 2 _1.

[0009] Mounting the electronic component 1 is pushed into the holder 2 is engaged with the holding portion 2 _2, the electrode 1 of the lower surface of the mounting the electronic component ₁ and the electrode 3 ₁ are conductively elastic connector part 2 ₁ of the substrate 3 To conduct.

[0010] The conductive portion of the elastic connector portion 2 ₁ of the electrically conductive, in consideration of the capacitance of the mounting electronic part used as a low resistance. The contact resistance is preferably 10Ω or less, and the medium of the conductive portion is preferably a metal powder having a low resistance value, carbon or graphite plated with a metal, a metal wire, or the like. Conductive portion, previously formed a conductive pattern as the electrodes 1 ₁ and the substrate electrode 3 ₁ mounting the electronic component 1 can be connected to the corresponding electrode.

FIG. 2 shows a method of manufacturing the holder of the present invention.

A mold is used in which a magnetic material 61 such as iron or a nickel alloy is embedded in the same pattern as the desired conductive pattern. The magnetic body 61 of the upper mold (a) is formed so as to protrude so as to enter the lower mold (b), and the magnetic body 61 is also embedded at the bottom of the lower mold (b).

In this mold, a liquid polymer such as silicone or urethane is mixed with a magnetic conductor such as nickel, iron or cobalt or an alloy containing these as a main component, or a conductor such as copper, aluminum, gold or silver. A material mixed with a material plated with a magnetic conductive metal, or conversely, a material obtained by plating a magnetic conductive metal or the like with a conductor is poured into a lower mold (b), and a magnetic force is applied from above and below to remove the magnetic conductor in the material. A magnetic conductor chain is formed by connecting beads in the direction of the line of magnetic force. That for magnetic conductor strands in the vertical direction of the elastic connector part 2 ₁ in the figure is oriented to form an elastic connector part 2 ₁ with anisotropic conducting in the vertical direction by. Thereafter, the liquid polymer such as silicone or urethane in the mold is cured by heat treatment or the like to complete the holder 2 in which the holding portion and the elastic connector portion are integrated.

In this way, it can be easily produced, and in use, it is only necessary to mount the mounting electronic parts on the holder, and detailed operations such as electrode positioning are not required.

[0015]

Embodiment 1 FIG. 3 shows a plan view and a cross section of a conductive pattern of a holder.

The conductive portion of the holder forms a conductive pattern so that the electrode of the mounted electronic component and the substrate electrode can be connected to the corresponding electrodes. For example, as shown in FIG. 3, the type a to the pattern electrodes 1 ₁ of the electronic component 1, type conductive portion is concentric b, type conductive portion is a random c, conductive parts A cross-shaped type d or the like is conceivable. In addition, when the type d is oriented by magnetic force, there is no leakage at the plus and minus poles due to the anisotropy.

In FIG. 4, a conductive elastic connector 2 is shown.
_1, the holding part 2 with respect to the _second bottom surface and a convex shape in the vertical, to improve the contact between the electrodes 1 ₁ and the substrate electrode 3 ₁ mounting the electronic component 1, also is designed to join moderate compression .

The holder shown in FIG. 4 is formed by using the mold 7 shown in FIG. The material of the mold is not particularly limited as long as it does not have magnetism, and may be a material such as aluminum, various alloys, or resin. A magnetic material 6 is provided in a desired position in the mold in the same pattern as the pattern of the conductive portion.
1 is embedded in the upper and lower molds 7. The material to be embedded in the mold is not particularly limited as long as it has magnetism, and may be iron or an alloy of nickel, cobalt, chromium, or the like.

[0019]

Embodiment 2 A manufacturing method for the product of Embodiment 1 will be described.

[0020] For liquid silicone rubber (Wacker Chemical Company LR7665A / B) 100 parts by weight, pouring materials well stirred degassed added 5-50 parts by weight of nickel powder in the lower mold ₇₁ of the mold 7, the lower die 7 _A magnetic field (magnetic flux density = 400 gauss) is applied from below to above ₁ to orient the nickel powder according to the conductive pattern. Place the on the type 7 ₂ Then, Sunawa
The mold was closed, and the liquid silicone rubber was cured by applying heat at 120 ° C. to obtain a holder shown in FIG. Before placing the upper mold 7 ₂ Here, first, the nickel powder subjected to the magnetic field to the lower die ₇₁ pouring the material was oriented as the pattern of the conductive portion, the nickel powder from flowing to the holding unit 2 ₂ This is to prevent

[0021] When the addition amount of the nickel powder to less than 5 parts by weight, there is a possibility that a portion of nickel particle chains does not penetrate in the vertical direction of the conductive elastic connector part 2 ₁ is formed. When nickel powder reversed more than 50 parts by weight, the center circle portion of the conductive elastic connector part 2 ₁ and the outer circumference portion is liable to leak electrically connected. Therefore, liquid silicone rubber 100
The addition of nickel powder is preferably 5 to 50 parts by weight, more preferably 10 to 20 parts by weight with respect to parts by weight.

Table 1 shows the relationship between the particle size of the magnetic conductive powder and the resistance value of the conductive elastic connector.

The resultant resistance value of the conductive elastic connector part 2 ₁ of the holder 2 depends on the particle size of the nickel powder, stable resistance value lower larger particles of the nickel powder was obtained. To simply obtain the holder 2 having a low and stable resistance value, for example, a nickel powder having a particle diameter of 125 μm or more may be used. However, the larger the particle size of the nickel powder, the worse the dispersibility tends to be. Therefore, the smaller the particle size of the nickel powder, the better to form a beautiful conductive pattern. Therefore, when it is desired to form a clean conductive pattern and obtain a low and stable low resistance, for example, a particle size of 30
It is desirable to use nickel powder coated with gold or silver with a diameter of from 40 μm to 40 μm.

Table 2 shows the orientation time depending on the difference between the viscosity of the liquid polymer and the particle size of the nickel powder.

The viscosity of the liquid polymer affects the orientation time of the nickel powder. Basically, it can be said that the lower the viscosity, the shorter the time required for orientation and the more advantageous in terms of the molding cycle. However, the lower the viscosity of the polymer, the lower the physical properties after curing. ~
2500P is good, more preferably 100P to 1000P
P.

An example of a method for assembling the holder 2 according to the present invention will be described below.

When a conductive elastic connector is used, an assembly method must be used in which the elastic connector is compressed to some extent in order to obtain stable conduction. Generally, the compression ratio is set by the thickness of the elastic connector portion,
Approximately 8 to 20% is an appropriate range.

The assembling method shown in Figure 6, had a hardness of the degree capable of compressing the elastic connector part 2 _1, composed of a material, for example resin, fitting 4 provided with a hole 8 in the desired position
Is separately provided, and the holder 2 already engaged with the mounting electronic component 1 is assembled therein. The mounting portion 4 ₁ attached to the fixture 4 is inserted and fixed to the mounting holes 3 ₂ of the substrate 3. Elastic connector part 2 ₁ this time is compressed and fixture 4 and the substrate 3, exhibits a stable resistance value.

Further assembling method shown in Figure 7, the housing 5 which is provided a hole 9 in the desired position, the microphone holder 2 already integrated holder 2 ₂ and the elastic connector 2 ₁ incorporating the mounting electronic part 1 It is a case where is assembled. When housing 5 is assembled to the main body, the conductive elastic connector part 2 ₁ is pressed is stable between the housing 5 and the substrate 3 is obtained. This eliminates the process of connecting the lead wires and the like by soldering, and only requires the process of mounting components, so that anyone can easily assemble.

[0030]

According to the holder of the present invention, a holding portion used for attaching a microphone electronic component used in a cellular phone or the like to a substrate and an elastic connector portion are integrated, so that a lead wire or the like is soldered. Therefore, the number of components and the number of assembling steps can be reduced, so that the manufacturing cost can be reduced.

Further, according to the manufacturing method of the present invention, a holder in which a holding portion having a complicated shape and an elastic connector portion are integrated can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a holder of the present invention.

FIG. 2 is a sectional view of a mold.

FIG. 3 is a plan view and a sectional view of a conductive pattern of a holder.

FIG. 4 is a plan view and a sectional view of a holder.

FIG. 5 is a sectional view showing a molding state.

FIG. 6 is a view showing a method of assembling the circuit board.

FIG. 7 is a view showing another method of assembling the circuit board.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electronic component 2 Holder 2 ₁ Elastic connector part 2 ₂ Retention part 3 Substrate 4 Attachment 5 Housing 6,7 Die 8,9 hole

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI B29L 31:26 H01R 23/68 M

Claims (7)

(57) [Claims] 1. A liquid polymer containing a magnetic conductor,
Inject into a mold for rudder molding and apply magnetic force to a desired location in the mold.
This magnetic force orients the magnetic conductor and makes it elastic.
After specifying the connector, the liquid polymer is cross-linked to
It is characterized by integrally forming the holding part for mounting parts
How to make a holder. 2. The method according to claim 1, wherein the mold for forming the holder has a desired conductive pattern.
Characterized by having the same pattern of magnetic material
A method for manufacturing the holder according to claim 1. 3. The method according to claim 1, wherein the elastic connector is specified by a liquid polymer.
Orientation to connect magnetic conductor beads along the magnetic line of applied magnetic force
3. The method according to claim 1, wherein
Manufacturing method of the above-mentioned holder. 4. A liquid polymer having a viscosity of 10P to 2500P.
4. The method according to claim 1, 2 or 3, wherein
How to make a holder. 5. The magnetic conductor according to claim 1, wherein the magnetic conductor is nickel, iron, cobalt or the like.
Alloys containing copper, aluminum, gold, silver, etc.
Those plated with a conductor , or those obtained by plating the magnetic conductor with the conductor
The method according to any one of claims 1 to 4, wherein
Manufacturing method of the above-mentioned holder. 6. A metal mold for orienting a magnetic conductor and an elastic connector.
The mold is clamped after specifying the
Item 6. The method for producing a holder according to any one of Items 1 to 5. 7. An elastic connector part is convex with respect to the bottom surface of the holding part.
7. The shape of claim 1, wherein:
The method for producing a holder according to any one of the above.